3 ms·
Friendly C should also require char to be unsigned so that this code is safe: int my_getchar(char *foo) { if (!*foo) return -1; // Return -1 at e
by jhallenworld 12y ago
Friendly C should also require char to be unsigned so that this code is safe:
int my_getchar(char *foo)
{
if (!*foo) return -1; // Return -1 at end of string
else return *foo; // Should never return -1
}
- kazinator 12y agoMore to the point, char should be unsigned so that this code is safe: #include <ctype.h> if (isdigit(str[i])) { ... } The ctype functions require an int-valued argument which is the value of an unsigned char: it must be a positive value, or the negative value EOF. This is an unfriendly pitfall in the language.